compilerplugins/clang/unoany.cxx

   1 /* -*- Mode: C++; tab-width: 4; indent-tabs-mode: nil; c-basic-offset: 4; fill-column: 100 -*- */
   2 /*
   3  * This file is part of the LibreOffice project.
   4  *
   5  * This Source Code Form is subject to the terms of the Mozilla Public
   6  * License, v. 2.0. If a copy of the MPL was not distributed with this
   7  * file, You can obtain one at http://mozilla.org/MPL/2.0/.
   8  */
   9
  10 #ifndef LO_CLANG_SHARED_PLUGINS
  11
  12 #include "check.hxx"
  13 #include "plugin.hxx"
  14
  15 namespace {
  16
  17 class UnoAny:
  18     public loplugin::FilteringPlugin<UnoAny>
  19 {
  20 public:
  21     explicit UnoAny(loplugin::InstantiationData const & data): FilteringPlugin(data) {}
  22
  23     bool preRun() override {
  24         return compiler.getLangOpts().CPlusPlus;
  25     }
  26
  27     void run() override {
  28         if (preRun()) {
  29             TraverseDecl(compiler.getASTContext().getTranslationUnitDecl());
  30         }
  31     }
  32
  33     bool VisitCXXOperatorCallExpr(CXXOperatorCallExpr const * expr);
  34 };
  35
  36 bool UnoAny::VisitCXXOperatorCallExpr(CXXOperatorCallExpr const * expr)
  37 {
  38     if (ignoreLocation(expr)) {
  39         return true;
  40     }
  41     StringRef aFileName = getFilenameOfLocation(
  42             compiler.getSourceManager().getSpellingLoc(compat::getBeginLoc(expr)));
  43     if (loplugin::isSamePathname(aFileName, SRCDIR "/include/com/sun/star/uno/Any.hxx")) {
  44         return true;
  45     }
  46     if (expr->getOperator() != OO_Equal) {
  47         return true;
  48     }
  49     if (!loplugin::TypeCheck(expr->getArg(0)->getType()).Class("Any").
  50          Namespace("uno").Namespace("star").Namespace("sun").Namespace("com").GlobalNamespace())
  51     {
  52         return true;
  53     }
  54     if (auto expr2 = dyn_cast<MaterializeTemporaryExpr>(expr->getArg(1))) {
  55         if (auto expr3 = dyn_cast<CXXBindTemporaryExpr>(expr2->GetTemporaryExpr())) {
  56             if (auto expr4 = dyn_cast<CallExpr>(expr3->getSubExpr())) {
  57                 if (loplugin::DeclCheck(expr4->getDirectCallee()).Function("makeAny").
  58                     Namespace("uno").Namespace("star").Namespace("sun").Namespace("com").GlobalNamespace()) {
  59                     report(
  60                             DiagnosticsEngine::Warning,
  61                             ("unnecessary copy, rather use <<= operator directly with the 'makeAny'"
  62                              " argument"),
  63                             expr->getOperatorLoc())
  64                       << expr->getSourceRange();
  65                     return true;
  66                 }
  67             }
  68         }
  69         if (isa<CXXFunctionalCastExpr>(expr2->GetTemporaryExpr())) {
  70             //expr->getArg(1)->dump();
  71             report(
  72                     DiagnosticsEngine::Warning,
  73                     ("unnecessary copy, rather use <<= operator directly with the 'Any' constructor"
  74                      " argument"),
  75                     expr->getOperatorLoc())
  76               << expr->getSourceRange();
  77             return true;
  78         }
  79     }
  80     //expr->getArg(1)->dump();
  81     return true;
  82 }
  83
  84 loplugin::Plugin::Registration<UnoAny> unoany("unoany");
  85
  86 } // namespace
  87
  88 #endif // LO_CLANG_SHARED_PLUGINS
  89
  90 /* vim:set shiftwidth=4 softtabstop=4 expandtab cinoptions=b1,g0,N-s cinkeys+=0=break: */